Emails forwarded to Yahoo are failing

Emails forwarded to Yahoo are failing

I set up mail forwarding to a yahoo address. It was working fine for quite a while, but now I am getting a mail forward failure. I didn't see anything wrong with the settings and don't recall changing anything since the forwarding last worked
 

Technical details of the failure:
4.7.0 [TS01] Messages from 74.201.84.158 temporarily deferred due to user complaints - 4.16.55.1; see https://help.yahoo.com/kb/postmaster/SLN3434.html